Improvement in friction device for the yarn-beams of looms



UNITED STATES PATENT OFFICE.

ALONZO BEEBE AND FRANCIS L. BESTER, OF ENFIELD, MASSACHUSETTS.

IMPROVEMENT IN FRICTION DEVICE FOR THE YARN-BEAMS 0F LOOMS.

Specification forming part of Letters Patet No. 13,S9, dated August 23,1864.

To all whom it may concern.:

Re it known that we, ALoNzo BEEBE and FRANCIS L. BESTER, both of Enield,in the county of Hampshire and State of Massachusetts, have invented anew and Improved Friction Device for the Yarn-Beams of Looms 5 and we dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this speeiiication, in which- Figure l is anelevation of the back of a loom having our invention applied. Fig. 2 isa vertical section at right angles toFig. 1.

Similar letters of reference indicate corresponding parts in both gures.

The object of this invention is to supply a means of producing andregulating the friction on the yarn-beam of a loom, whereby suchfriction will be rendered uniform, and the cockling of the cloth will beeffectually prevented; and to this end it consists in the employment ofa flexible friction-strap, D, of leather or other similar material, uponthe drum C, the tension of the strap being regulated by two crossedlevers pivoted together like the legs of a pair of tongs or pinchers andadjusted by a screw.

To enable those skilled in the art to make and use our invention, wewill proceed to describe its construction and operation.

A is the frame of the loom, and B is the yarn-beam, having its journalsarranged in the usual bearings. C C are the frictiondrums fast on theyarn-beam. Our invention is represented as applied to one of these drumsonly, as that will be suflicient.

D is the flexible friction-strap, of leather or other similar material,encircling about three-fourths of the circumference of the drum, andmade with a loop, a, at each end, one of the said loops being adjustedby a buckle, d, to adjust the length of the strap according to thecircumference of the drum. E E are the crossed levers pivoted togetherby a pin, c, like a pair of pinchers or tongs, and each having an eye,b,`at its upper end for the reception of one of the loops a a of theexible friction-strap, one of the said loops being connected with oneand the other with the other of such levers. F is the adjusting-screw,secured to the lower part of the lever E or passing through it andfurnished with a head, I, at the back thereof, and passing through aslotted lug, e, on one side of the lower part of the lever E', in frontof which it is furnished with a nut, f, which screws up against the saidlever to tighten the band, and with a second nut, g, which is screwed upagainst the first one to secure it in the position to which it isadjusted. The upper' end of the slot in the lug eis open to permit thescrew to he slipped in or out to apply or remove the friction of thestrap without removing the nuts from the screw. The upper part of thelever 4" is connected with the frame ot' the loom by a metal strap, h,by which the levers and straps are prevented froin turning with thebeam.

By screwing up the nut fagainst the lever E the lower partsV of thelevers E E' are drawn toward each other, and by that means the upperparts are caused to approach each other and tighten the flexiblefriction-strap upon the drum; and by moving the nuts in the oppositedirection the opposite effect is produced, and in this way the'iexiblefrictionstrap is tightened or slackened to increase or diminish thefriction as required. When the friction of the strap is adjusted, itwill be perfectly uniform and cannot be altered by the weaver withoutthe use of a wrench to turn the nuts.

The upper end of the lever E is iitted with a movable piece, t', inwhich its eye b is formed, the said piece being connected with theprincipal portion of the lever by a slot, j, and set-screw 7c to enableitto be adjusted and secured in a higher or lower position to adapt thestrap to beams of different sizes.

One advantage of this friction device is that its weight is less thanone-fifteenth part of that of the devices commonly used.

What we claim as our invention, and desire to secure by Letters Patent,is-

v The employment of a tiexible friction-band, D, ofleather or othersimilar materia-l, upon the drum C, regulated as to tension by the twocrossed levers E E and their tighteningscrew F.

ALONZO BEEBE. FRANCIS L. BESTER.

Witnesses Guns. RICHARDS, ORIAs RANDALL.

